'Wall' in the Bible

Then the angel of Jehovah stood in a narrow path between the vineyards, a wall being on this side, and a wall on that side.

And the ass saw the angel of Jehovah, and she thrust herself unto the wall, and crushed Balaam's foot against the wall: and he smote her again.

And the suburbs of the cities, which ye shall give unto the Levites, shall be from the wall of the city and outward a thousand cubits round about.